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TMP303 データシート(PDF) 9 Page - Texas Instruments

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部品番号 TMP303
部品情報  Temperature Range Monitor In Micropackage
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メーカー  TI1 [Texas Instruments]
ホームページ  http://www.ti.com
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TMP303 データシート(HTML) 9 Page - Texas Instruments

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HYST
SET0
HYST
SET1
SOH
OUT
Time
T =0
L
C
°
T =60
H
C
°
10 C
°
50 C
°
5 C
°
Measured
Temperature
Changeshysteresis
from10
to
C
5 C
°
°
ForcesOUTpinhigh
regardlessoftemperature
9
TMP303
www.ti.com
SBOS486F – JULY 2009 – REVISED FEBRUARY 2016
Product Folder Links: TMP303
Submit Documentation Feedback
Copyright © 2009–2016, Texas Instruments Incorporated
8.3 Feature Description
8.3.1 HYSTSET0, HYSTSET1 and SOH Functionality
The TMP303A temperature trip window resides within the range of 0°C to 60°C, the TMP303B within 0°C to
55°C, the TMP303C within –20°C to 60°C, and the TMP303D within –15°C to 125°C. When any of these trip
thresholds is crossed, the output (OUT) changes state from low to high. OUT does not return to its original low
state until the temperature crosses the hysteresis threshold and returns within the range of the temperature trip
window.
As an example, if the TMP303A is configured with a 10°C hysteresis window (that is, HYSTSET0 = HYSTSET1 =
VS), the output does not return to its low state until the temperature either crosses (TL + hysteresis) = 10°C or
(TH – hysteresis) = 50°C. The Set Output High (SOH) pin is intended to add test functionality to verify the
connectivity of the output (OUT) pin to the system controller or other temperature response system. The SOH pin
is internally pulled down to ground with a 100-k
Ω resistor. If the SOH pin is grounded or left floating, it has no
effect on the behavior of the TMP303A. If the SOH pin is pulled high, the TMP303A immediately forces the
output high, regardless of temperature.
NOTE
This response occurs even if the temperature falls within the 0°C to 60°C temperature
window.
Figure 10 shows this design in graphical form.
Figure 10. TMP303A Output Transfer Curves With Hysteresis Change from 10°C to 5°C and SOH
Functionality


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